Uninvited adj. Not invited.Unitary adj. 1 of a unit or units. 2 marked by unity or uniformity. [from *unit or *unity] Makedonija Universal coupling n. (also universal joint) coupling or joint which can transmit rotary power by a shaft at any angle.Tie-up n. Connection, association.Unknown quantity n. Mysterious or obscure person or thing.Tights n.pl. 1 thin close-fitting wool or nylon etc. Garment covering the legs, feet, and the lower part of the torso, worn by women and girls. 2 similar garment worn by a dancer, acrobat, etc.Tidemark n. 1 mark made by the tide at high water. 2 a line left round a bath by the dirty water. B colloq. Line between washed and unwashed parts of a person's body.Unitary adj. 1 of a unit or units. 2 marked by unity or uniformity. [from *unit or *unity]Tie-up n. Connection, association.Unknown quantity n. Mysterious or obscure person or thing.